颱風侵台期間路徑發生打轉之研究

A Study on the Occurrence of Looping Track for Typhoons Affecting Taiwan

10.6342/NTU.2010.01986

陳雨青

颱風 ； 打轉 ； 焚風 ； WRF ； 渦度收支 ； Typhoons ； Looping tracks ； Foehn ； WRF ； Vorticity budget

臺灣大學大氣科學研究所學位論文

2010年

碩士

李清勝

繁體中文

本研究使用中央氣象局歷史颱風資料，分析侵台時具打轉路徑的颱風之特徵，並使用WRF模擬侵台期間發生打轉的辛樂克颱風（2008），探討導致打轉現象的可能原因。分析時為幫助了解打轉颱風的重要特徵，亦針對和打轉個案具相似路徑但並未打轉的颱風進行分析。結果顯示，西北行侵襲北台灣之颱風，若其生命期中曾發展至強烈颱風且移動速度較慢時，侵台期間發生打轉路徑的可能性較高。當颱風登陸台灣的緯度較高時，打轉的位置傾向先貼著地形邊界往南偏移；但若在較低緯度登陸時，開始打轉的位置約在23.6°N離地形0.4°經度。另一方面，曾發展至強烈颱風的打轉個案在打轉前，台灣東南部測站大都會觀測到強焚風；而侵台期間未打轉的相似路徑颱風於登陸前，東南部各測站之焚風發生頻率及強度均遠小於打轉個案。 控制組模擬（CTRL）結果顯示，當颱風剛登陸時，近中心強風速區由東北側移到西北側，之後颱風逐漸往西南方偏移。低層渦度收支分析顯示，打轉期間輻散項和剩餘項對於提供渦度變率的正貢獻多於渦度平流項。分析CTRL（最大風速半徑為70 km）和對照組實驗結果顯示，TR-60（最大風速半徑為60 km，未打轉）之颱風登陸前，台灣東南部海面上達36 ℃的暖空氣區域，其範圍較TR-80（最大風速半徑為80 km，打轉）或CTRL者為小，顯示颱風侵台期間台灣東南部海域的乾熱區似與颱風小範圍打轉現象有所關聯。

Purpose of this study is to examine the occurrence of looping track for typhoons affecting Taiwan such as Supertyphoon Sinlaku（2008）. All typhoons which invaded northern Taiwan in 1990∼2009 and experienced looping tracks are examined. In addition, all typhoons with similar tracks but did not have looping tacks are also examined. Results show that a typhoon which moves northwestward to affect northern Taiwan tends to have higher possibility to take a looping track if its intensity is stronger and the moving speed is slower. The position of the looping path also is related to TYs’ landfall position. On the other hand, significant foehn phenomenon often occurs near southeastern Taiwan before the looping track of typhoon. High resolution（4 km）simulation is conducted using WRF（Weather Research and Forecasting Model）V3.1.1 to investigate the possible mechanisms leading to the looping motion of Supertyphoon Sinlaku which affected Taiwan in 2008. In the control experiment, the typhoon intensity, structure and track especially the landfall point and the looping track are well-simulated. When Sinlaku just making landfall, its stronger wind field shift from northeast to northwest. Such change in wind field structure tended to drift typhoon toward the southwest. A detail vorticity budget analysis（η = 0.88∼0.993）reveals that the divergence term and residual term were enhanced significantly. They are the major contribution to the local change of relative vorticity and cause typhoon to change its moving direction from northwestward to southwestward. At low level（η = 0.993）, a large area of warm and dry air which is caused by the adiabatic warming of the downslope flow associated with Sinlaku after crossing over the mountains is observed at the southeast of Taiwan.

1. 李清勝與張龍耀，2003：妮蔻兒颱風（Nichole,1998）侵台前路徑變化之研究。大氣科學，31，285-306。
   連結：
2. 洪秀雄與胡仲英，1989：颱風引發焚風之初步研究。大氣科學，17，1-44。
   連結：
3. 黃清勇與許依萍，1998：台灣地形對理想型颱風環流之影響。大氣科學，26， 281-324。
   連結：
4. 簡國基與李清勝，2002：楊希颱風（楊希，1990）侵台的數值模擬與分析。大氣科學，30，147-170。
   連結：
5. Adem, J., 1956：A series solution for the barotropic vorticity equation and its application in the study of atmospheric vortices. Tellus, 8, 364-372.
   連結：
6. Bender, M. A., R. E. Tuleya, and Y. Kurihara, 1987：A numerical study of the effect of island terrain on tropical cyclones. Mon. Wea. Rev., 115, 130-155.
   連結：
7. Brand, S., and J. W. Blelloch, 1974：Changes in the characteristics of typhoons crossing the island of Taiwan. Mon. Wea. Rev., 102, 708-713.
   連結：
8. Chan, J. C.-L., 1984：An observational study of the physical processes responsible for tropical cyclone motion. J. Atmos. Sci., 41, 1036-1048.
   連結：
9. ______, and R. T. Williams, 1987：Analytical and numerical studies of the beta-effect in tropical cyclone motion. Part I：Zero mean flow. J. Atmos. Sci., 44, 1257-1265.
   連結：
10. ______, and F. M. F. Ko, and Y. M. Lei, 2002：Relationship betweenPotential Vorticity Tendency and Tropical Cyclone Motion. J. Atmos. Sci., 59, 1317-1336.
    連結：
11. Chang, S. W.-J., 1982：The orographic effects induced by an island mountain range on propagating tropical cyclones. Mon. Wea. Rev., 110, 1255-1270.
    連結：
12. Chen, T.-C., S.-Y. Wang, M.-C. Yen, A.-J. Clark, and J.-D. Tsay, 2010：Sudden surface warming-drying events caused by typhoon passages across Taiwan. Amer. Meteor. Soc., 49, 234-252.
    連結：
13. DeMaria, M., 1985：Tropical cyclone motion in a nondivergent barotropic model. Mon. Wea. Rev., 113, 1199-1210.
    連結：
14. Dudhia, J., 1989：Numerical study of convection observed during the winter monsoon experiment using a mesoscale twodimensional model. J. Atmos. Sci., 46, 3077-3107.
    連結：
15. Fiorino, M. and R. L. Elsberry, 1989：Some aspects of vortex structure related to tropical cyclone motion. J. Atmos. Sci., 46, 975-990.
    連結：
16. Grell, G. A., and D. Devenyi, 2002：A generalized approach to parameterizing convection combining ensemble and data assimilation techniques. Geophys. Res. Lett., 29, 1693.
    連結：
17. Holland, G. J., 1983： Tropical cyclone motion：Environmental interaction plus a beta effect. J. Atmos. Sci., 40, 328-342.
    連結：
18. Hong, S.-Y., and H.-L. Pan, 1996：Nonlocal boundary layer vertical diffusion in a medium-range forecast model. Mon. Wea. Rev., 124, 2322-2339.
    連結：
19. Huang, Y.-H., C.-C. Wu, and Yuqing Wang, 2010：The Influence of the Island Topography on Typhoon Track Deflection.（Submitted to Mon. Wea. Rev., 2010）
    連結：
20. Jian, G.-J., C.-S. Lee, and G. T. J. Chen, 2006：Numerical simulation of Typhoon Dot（1990）during TCM-90：Typhoon Dot’s discontinuous track across Taiwan. Terr. Atmos. Oceanic Sci., 17, 23-52.
    連結：
21. ______ and C. C. Wu, 2008：A Numerical Study of the Track Deflection of Supertyphoon Haitang（2005）Prior to Its Landfall in Taiwan. Mon. Wea. Rev., 136, 598-615.
    連結：
22. Kuo, H.-C., R. T. Williams, Jen-Her Chen, and Yi-Liang Chen, 2001：Topographic effects on barotropic vortex motion： no mean flow. J. Atmos. Sci., 58, 1310-1327.
    連結：
23. Lin, Y.-L., J. Han, D. W. Hamilton, and C.-Y. Huang, 1999：Orographic influences on a drifting cyclone. J. Atmos. Sci., 56, 534-562.
    連結：
24. ______, S.-Y., Chen, C. M. Hill, and C.-Y., Huang, 2005：Control parameters for the influence of a mesoscale mountain range on cyclone track continuity and deflection. Amer. Meteor. Soc., 62, 1849-1866.
    連結：
25. ______, N. C. Witcraft, and Y.-H. Kuo, 2006：Dynamics of track deflection associated with the passage of tropical cyclones over a mesoscale mountain. Mon. Wea. Rev., 134, 3509-3538.
    連結：
26. McWilliams, J. C., and G. R. Flierl, 1979：On the evolution of isolated, nonlinear vortices. J. Phys. Oceanogr., 9, 1183-1206.
    連結：
27. Mlawer, E. J., S. J. Taubman, P. D. Brown, M. J. Iacono, and S. A. Clough, 1997：Radiative transfer for inhomogeneous atmospheres：RRTM, a validated correlated-k model for the longwave. J. Geophys. Res., 102, 16,663-16,682.
    連結：
28. Wu, C.-C., and Y.-H. Kuo, 1999：Typhoons affecting Taiwan： Current understanding and future challenges. Bull. Amer. Meteor. Soc., 80, 67-80.
    連結：
29. ______, 2001：Numerical simulation of Typhoon Gladys（1994）and its interaction with Taiwan terrain using GFDL hurricane model. Mon. Wea. Rev., 129, 1533-1549.
    連結：
30. ______, T.-H. Yen, Y.-H. Kuo, and W. Wang, 2002：Rainfall simulation associated with Typhoon Herb（1996）near Taiwan. Part I：The topographic effect. Wea. and Forecasting, 17, 1001-1015.
    連結：
31. Yeh, T. C. and R. L. Elsberry, 1993a：Interaction of typhoon with the Taiwan orography. Part Ⅰ：Upstream track deflection. Mon. Wea. Rev., 121, 3193-3212.
    連結：
32. 參考文獻
33. 王時鼎，1980：台灣近海颱風運動及強度預報法。行政院國科會計畫研究報告，18，1-100。
34. 交通部中央氣象局，歷史颱風資料庫 （http：//photino.cwb.gov.tw/tyweb/tyfnweb/historical.htm）。
35. 李志昕，2009：西北向侵台颱風登陸前中心路徑打轉之模擬研究。國立中央大學大氣物理研究所碩士論文，共82頁。
36. 林雨我與徐晉淮，1988：侵襲臺灣颱風之降雨分佈研究，氣象學報，34（3），196-215。
37. 郭文鑠與楊之遠，1982：颱風誘發焚風現象及其對農作物之影響，氣象學報，28（34），1-12。
38. 謝信良、王時鼎、鄭明典與葉天降，1997：台灣地區颱風預報輔助系統建立之研究，第二階段：侵台颱風路徑、強度、風力預報之應用研究（二）。中央氣象局氣象科技研究中心專題研究報告，CWB85-1M-01，382pp。
39. 葉天降、陳得松、蕭玲鳳與黃康寧，2005：海棠颱風行徑受台灣地形影響之探討。海峽兩岸災變天氣分析與預報研討會論文彙編，94，107-110。
40. 葉天降、蕭玲鳳、陳得松與黃康寧，2007：台灣地形引致颱風路徑廻轉之探討。中央氣象局天氣分析與預報研討會論文彙編，96，58-62。
41. Huang, C. Y. 1993：Study of Three Dimensional Anelastic Non-hydrostatic Model（in Chinese）. Research Report, National Science Council, R. O. C., Taipei, R. O. C.
42. Liao. S. Y., 1979：Analysis of typhoon modification in Relation to Foehn wind over Taiwan. The Bulletin of Institute of Geophysics, National Central University, 18, 106-122.
43. Rogers, E., T. Black, B. Ferrier, Y. Lin, D. Parrish, and G. DiMego, Cited 2001：Changes to the NCEP Meso Eta Analysis and Forecast System： Increase in resolution, new cloud microphysics, modified precipitation assimilation, modified 3DVAR analysis. NWS Technical Procedures Bulletin 488, NOAA/NWS, 2001.
44. Shieh, S.-L., S.-T. Wang, M.-D. Cheng, and T.-C. Yeh, 1996：User’s guide（1）for typhoon forecasting in the Taiwan area（in Chinese）. Res. Rep. CWB84-1M-01, 356 pp.
45. Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang, and J. G. Powers, 2005：A description of the Advanced Research WRF Version 2. NCAR Tech Notes-468+STR.